Why are the keyboards of cash machines made of stainless ste

Everyone of us often go to ATM to deposit and withdraw money. Have you ever thought of a question: why do the keys of ATM use stainless steel? What happens without stainless steel?

Bank ATMs are usually stainless steel digital keyboards, which have the advantage of preventing leaks.

Think about it: when you press the password with your finger, the temperature of the keyboard will be changed. If we take a picture with a thermosensitive camera just after a successful transaction, we can get the password by looking at the picture